Latest post Sun, Mar 17 2019 1:35 AM by pantau. 52 replies.
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  • Wed, Jan 16 2019 1:37 PM In reply to

    • pantau
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    Re: Convert OMF to MXF without transcoding

    DStone:

    pantau:
    Consolidating doesn't do the job, even when media creation settings is set to MXF.
    Or thinking about it in hindsight, maybe it did. If you consolidate an OMF using a different CODEC, does it create a new OMF with the new CODEC embedded?

    What do you mean by "consolidate using a different CODEC"? That would mean to transcode, doesn't it?

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Wed, Jan 16 2019 2:09 PM In reply to

    • pantau
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    Re: Convert OMF to MXF without transcoding

    DStone:

    And just to return to the original question, if it is raw DV in an OMF file, you can get it out using FFMPEG (or any of the HDCinematics app's which provide a front-end to FFMPEG). Just to get the video out with FFMPEG you can use something like:

    ffmpeg -i inputfilename.omf -c:v copy -c:a copy outputfile.dv

    This rewraps the audio and video back into a DV file. You can also try using outputfile.mov or -f mxf_opatom outputfile.mxf to wrap the DV into a .MOV or .MXF container, but I'm not sure how well that will work. This is very fast to try as it's a rewrap and not a transcode.

    You can download ffmpeg from https://www.ffmpeg.org/download.html.

    I'll try this!

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Wed, Jan 16 2019 2:10 PM In reply to

    • pantau
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    Re: Convert OMF to MXF without transcoding

    luca.mg:

    You can't export AAF from an OMF based project

    Technically you can...

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  • Wed, Jan 16 2019 2:15 PM In reply to

    • pantau
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    Re: Convert OMF to MXF without transcoding

    Job ter Burg:

    A Same As Source Export would do that.

    In the export dialog, only OMF shows up as options (even though in media creation mxf is selected)...

     

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Wed, Jan 16 2019 2:42 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    pantau:

    DStone:

    pantau:
    Consolidating doesn't do the job, even when media creation settings is set to MXF.
    Or thinking about it in hindsight, maybe it did. If you consolidate an OMF using a different CODEC, does it create a new OMF with the new CODEC embedded?

    What do you mean by "consolidate using a different CODEC"? That would mean to transcode, doesn't it?

    These are excepts from MC2018.12 help for Consolidate:

    "When you consolidate media files, your Avid editing application finds the media files or portions of media files associated with selected clips, subclips, or sequences. It then makes copies of them, and saves the copies on a target drive that you specify...
    ...Master Clips
    When you consolidate a master clip, your Avid editing application creates exact copies of the media files.
    ...Sequences
    When you consolidate a sequence, your Avid editing application copies only the portions of media files edited into the sequence and creates new master clips for each clip in the sequence...."

    In the Consolidate dialog the is no choice for Video MXF, OMF or codec. There is a choice to convert Audio Sample Rate, Bit Depth and Format (MXF, OMF).

    In an earlier comment I said Consolidate will create Same as Source media. Maybe a bad choice of words due to thinking of Export SAS QuickTime but Consolidate has always given me the same video and audio as my source media unless I select an audio change. I use Transcode to end up with a different codec.

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
  • Wed, Jan 16 2019 4:04 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    pantau:

    The media is DV.

    Consolidating just leaves it OMF, as it was before.

    Transcoding makes no sense, as it would recompress it.

    I went to a 30i NTSC Avid project and found an old test clip that Avid says is OMF DV 50. I did a QT SAS Export. I then did a legacy Import. 2018.12 warned me that my settings (MXF 2:1) did not match the file. I told it to keep the file settings. At that point Avid did a Fast Import giving me MXF DV 50. I think that this was just a two step re-wrap, no recompress. Maybe you could then relink to the MXF media. 

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
  • Sat, Jan 19 2019 6:37 PM In reply to

    • pantau
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    Re: Convert OMF to MXF without transcoding

    DStone:

    ffmpeg -i inputfilename.omf -c:v copy -c:a copy outputfile.dv

    I manage to convert to .dv, and the file plays in VLC. However, it doesn't import into MC, saying that the file format is not support for import.

    I paste the ffmpeg log below, but it seems to be ok:

    Input #0, dv, from 'input.omf':
      Metadata:
        timecode        : 00:07:39:04
      Duration: 00:00:14.50, start: 0.000000, bitrate: 28799 kb/s
        Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 64:45 DAR 16:9], 25000 kb/s, 25 fps, 25 tbr,
    25 tbn, 25 tbc
        Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Output #0, dv, to 'outputfile.dv':
      Metadata:
        timecode        : 00:07:39:04
        encoder         : Lavf58.20.100
        Stream #0:0: Video: dvvideo, yuv420p, 720x576 [SAR 64:45 DAR 16:9], q=2-31, 25000 kb/s, 25 fps,
    25 tbr, 25 tbn, 25 tbc
        Stream #0:1: Audio: pcm_s16le, 48000 Hz, stereo, s16, 1536 kb/s
    Stream mapping:
      Stream #0:0 -> #0:0 (copy)
      Stream #0:1 -> #0:1 (copy)
    Press [q] to stop, [?] for help
    [dv @ 00000000026ba8c0] Non-monotonous DTS in output stream 0:0; previous: 361, current: 302; changi
    ng to 362. This may result in incorrect timestamps in the output file.
    [dv @ 00000000026ba8c0] Unexpected frame size, 120000 != 144000
    frame=  363 fps=0.0 q=-1.0 Lsize=   50906kB time=00:00:14.52 bitrate=28720.7kbits/s speed= 127x
    video:51023kB audio:2721kB subtitle:0kB other streams:0kB global headers:0kB muxing overhead: unknow
    n

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Sun, Jan 20 2019 5:44 AM In reply to

    • luca.mg
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    Re: Convert OMF to MXF without transcoding

    Not clear what You want to accomplish with Your OMF files, convert to MXF or export to AAF? And if You have to use them in MC, what is the point of a .DV intermediate? Or an AAF one? No need to complicate an easy task: switch the media creation settings to MXF and transcode to a resolution equal or slightly greater than DV. Or please make clear Your goal.

    Symphony 2018.9, BM Intensity Pro 4k, Windows 10, i7-5930K, 32 GB ram, Quadro K620 [view my complete system specs]

    peace luca

  • Sun, Jan 20 2019 7:13 AM In reply to

    Re: Convert OMF to MXF without transcoding

    U

    pantau:

    Job ter Burg:

    A Same As Source Export would do that.

    In the export dialog, only OMF shows up as options (even though in media creation mxf is selected)...

     

    that’s not right. I am talking about a Same as Source Quicktime exports. There wouls be no OMF or MXF anywhere in the options for that.

    Can you describe what exactly you are trying to achieve?

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  • Sun, Jan 20 2019 2:14 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    Job ter Burg:

    that’s not right. I am talking about a Same as Source Quicktime exports. There wouls be no OMF or MXF anywhere in the options for that.

    Can you describe what exactly you are trying to achieve?

    pantau,

    Job is correct. Export Quicktime Same as Source will rewrap your dv media as mov. You can then set your media creation settings for mxf dv and Avid will "fast import" (rewrap) your media to mxf. You would then have to relink to the new media. At that point you could export the AAF's and what ever else you have in mind. It would be great if Avid would do all that as an option in Consolidate but as far as I know it will not. 

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
  • Sun, Jan 20 2019 3:00 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    luca.mg:

    ... No need to complicate an easy task: switch the media creation settings to MXF and transcode to a resolution equal or slightly greater than DV. ...

    pantau,

    Have you tried luca's suggestion?
    What does Avid say your omf media is? DV50, DV25 411, other?
    Can you match that codec in your media creation settings when set to make mxf? (lucu: "...resolution equal...")
    If you can match settings then it is possible that the software design for Transcode will just copy the omf media to new mxf media without de/re-compress. Would this get you what you need?

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
  • Sun, Jan 20 2019 3:28 PM In reply to

    • pantau
    • Top 500 Contributor
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    Re: Convert OMF to MXF without transcoding

    luca.mg:

    Not clear what You want to accomplish with Your OMF files, convert to MXF or export to AAF? And if You have to use them in MC, what is the point of a .DV intermediate? Or an AAF one?

    Job ter Burg:

    that’s not right. I am talking about a Same as Source Quicktime exports. There wouls be no OMF or MXF anywhere in the options for that.

    Can you describe what exactly you are trying to achieve?

    DonE:

    Job is correct. Export Quicktime Same as Source will rewrap your dv media as mov. You can then set your media creation settings for mxf dv and Avid will "fast import" (rewrap) your media to mxf. You would then have to relink to the new media. At that point you could export the AAF's and what ever else you have in mind. It would be great if Avid would do all that as an option in Consolidate but as far as I know it will not. 

    What I want to achieve is to make the sequence readable for other programs throguh AAF export. OMF is only readable by Avid.

    I managed to QT export. However, I wonder if this really only rewraps and doesn't reencode to DV, even when "same as source" is selected?

    Secondly, exporting the sequence and reimporting it doesn't create individual media clips, but a new clip for the whole sequence. So there is no chance to relink.

    I tried to QT reference export, but get an error saying that the sequence "contains clips with image size reformatting" (which is not the case), telling me to mixdown.

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Sun, Jan 20 2019 3:35 PM In reply to

    • pantau
    • Top 500 Contributor
    • Joined on Mon, Oct 31 2005
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    Re: Convert OMF to MXF without transcoding

    DonE:

    If you can match settings then it is possible that the software design for Transcode will just copy the omf media to new mxf media without de/re-compress.

    Would there by any possibility to check if it was transcoded (that is, recoded with the same settings) or only rewrapped?

    Win7 SP1 Avid 8.3.1 Quicktime 7.7.9 IBM Carbon X1 5th, 16GB RAM [view my complete system specs]
  • Sun, Jan 20 2019 4:13 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    pantau:

    Would there by any possibility to check if it was transcoded (that is, recoded with the same settings) or only rewrapped?

    Might only be the developers who would know for sure. Sometimes there are clues in the popups during process. When Import shows "fast importing" it is a rewrap. Also check the Console text. You might try transcoding to the same codec and then again to a similar bit rate different codec and compare the time it takes. I would expect that rewrap would be much faster.

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
  • Sun, Jan 20 2019 6:15 PM In reply to

    • DonE
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    Re: Convert OMF to MXF without transcoding

    pantau:

    What I want to achieve is to make the sequence readable for other programs throguh AAF export. OMF is only readable by Avid.

    I managed to QT export. However, I wonder if this really only rewraps and doesn't reencode to DV, even when "same as source" is selected?

    Secondly, exporting the sequence and reimporting it doesn't create individual media clips, but a new clip for the whole sequence. So there is no chance to relink.

    I tried to QT reference export, but get an error saying that the sequence "contains clips with image size reformatting" (which is not the case), telling me to mixdown.

    The idea of QT SAS export, fast import and relink is based on exporting your source clips for your sequence. This may be more work than you want to do. I did test a single clip export / fast import and am fairly sure it was a rewrap in both directions.

    When you QT SAS export a sequence you will have a mov with all the different codecs used in your sequence. Graphics, titles and even "filler" may all be different codecs. Hard to say how this imports but if Avid show something like "Importing from Quicktime..." it is being de/reencoded though the Quicktime engine. I think only when Avid shows "Fast Importing.." is it a rewrap.

    1x AMC/Sy 8.2.11-Win7 Pro 64-HP z800-dual 6core-24GB-Quadro FX 4800-Nitris DX QT775 NV340.84** 3x AMC/Sy 8.2.11-Win7 Pro 64-HP xw8600-8GB-Quadro FX 3700... [view my complete system specs]
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